BUG: parent level attr not working

Hey, so thing is, I have page when I limit max depth of parent levels to 3, code is working.
But after activating Nested pages plugin, it does not work anymore. On single page edit I can again set as deep as I want, like without my code.
Also drop & drag UP allow me to set much deeper logic.
I must limit it somehow, does nested pages have some special hooks to do it?

function limit_hierarchy_depth($args) {
    $args['depth'] = 3;
    return $args;
}
add_filter('page_attributes_dropdown_pages_args','limit_hierarchy_depth');
add_filter('quick_edit_dropdown_pages_args', 'limit_hierarchy_depth');